RIP Računari I Periferije Kolokvijum

Modular power supplies allow for the removal of unnecessary cables, which helps in reducing cable clutter and improving airflow within the system. This can lead to better cooling and overall system performance. Additionally, modular power supplies provide flexibility by allowing users to only connect the cables that are needed for their specific setup, minimizing cable management issues.

The video signals for the red, green, and blue colors are located on pins 1, 2, and 3 of the VGA connector in the monitor.

If there is an integrated serial port on the motherboard, it is necessary to have voltages of +12V and -12V. Additionally, HDD and CD/DVD devices are powered by +5V and +12V. This statement is true because integrated serial ports typically require these voltages for proper operation, and HDD and CD/DVD devices commonly use these voltages for power supply.

Modular power supplies allow for the removal of unnecessary cables. This means that users can connect only the cables they need for their specific setup, reducing cable clutter and improving airflow in the system. This can also make cable management easier and more organized.

The recommendation is that the continuous power should be greater than the calculated power that needs to be used. This means that it is advised to have a power source or system with a capacity that exceeds the power requirements to ensure that it can handle the load without any issues or failures.

The recommended refresh rate for CRT monitors is 75 Hz. This refers to the number of times the image on the screen is refreshed per second. A higher refresh rate reduces flickering, which can cause eye strain and fatigue. 75 Hz is a common refresh rate that provides a smooth and comfortable viewing experience.

The given statement states that the sensor at the top of the paper provides information about the position of the paper to the DC controller. Since this statement is true, it implies that the sensor is responsible for detecting the position of the paper and relaying that information to the DC controller.

The correct answer is 25KV. The question is asking about the voltage of the anode in a CRT monitor. The anode voltage in a CRT monitor is typically very high, often in the kilovolt range, to accelerate the electrons and create the necessary energy for the display. Therefore, 25KV is the most suitable answer as it represents a high voltage value.

The correct answer is 3. CRT monitors use three electron guns to display colors: one for red, one for green, and one for blue. These guns shoot electrons at the screen, which excite phosphors and produce colored light. By combining different intensities of red, green, and blue, the monitor can create a wide range of colors. Therefore, three electron guns are necessary to display a full-color image on a CRT monitor.

The resolution of the image is given as 1024x768. In a 24-bit color mode, each pixel requires 3 bytes (8 bits per color channel). So, the total memory required to store the image can be calculated as 1024 x 768 x 3 bytes = 2,359,296 bytes. Converting this to megabytes, we get approximately 2 MB. Therefore, the correct answer is 2 MB.

DVI-D konektor se koristi za prenos isključivo digitalnih signala, dok se DVI-I koristi za prenos i analognih i digitalnih video signala.

The laserski zrak (laser beam) of the printer is directed onto individual parts of the photosensitive roller using a rotating mirror (rotirajuće ogledalo). This suggests that the laser beam is reflected off the rotating mirror to target specific areas of the roller for printing.

NAS (Network Attached Storage) is a type of storage device that is typically without a keyboard and display. It is designed to be connected to a network and accessed by multiple users simultaneously. Unlike a standalone computer, NAS does not have its own operating system and relies on the network to perform its functions. Additionally, NAS may not support RAID 1, which is a redundant storage configuration that mirrors data across multiple drives for increased data protection.

Switching power supplies require a load to operate correctly, and in most cases, it is sufficient to have them connected to a circuit board. This means that the statement "Prekidački stepeni za napajanje za pravilan rad zahtevaju opterećenje i kod većine je dovoljno da su priključeni namatičnu ploču" is true.

The correct answer is 600-800 V. This is because fluorescent lamps used for backlighting TFT monitors require a high voltage to operate efficiently. The range of 600-800 V is within the typical voltage range for these types of lamps.

The correct answer is "broj mogućih promena intenziteta boje" which translates to "the number of possible changes in color intensity." This explanation suggests that the depth of color refers to the range of variations in color intensity that can be achieved.

The explanation for the given correct answer is that on a molex connector, the grounding is connected through wires with a black insulator, while the 12V voltage is connected through a yellow wire and the +5V voltage is connected through a red wire. This means that the statement is true.

The given statement states that an additional 150W can be supplied to the graphics card through an 8-pin connector, resulting in a total power of 225W. This implies that the graphics card has a power consumption of 75W (225W - 150W). Therefore, the statement is true.

The statement is true. The output of the DC/DC converter of the TFT panel at -10V is used to turn off all the other lines of the panel. This suggests that the -10V output is responsible for controlling the power supply or signal lines of the TFT panel, allowing them to be turned off when necessary.

The correct answer is "obrađuje ASCII podatke o slici". This is because the question asks for the function of the formatter in a laser printer. The formatter is responsible for processing ASCII data about the image, which means it converts the image data into a format that the printer can understand and print. The other options mentioned, such as transporting paper, controlling photosensors, and controlling micro sensors, are not the primary functions of the formatter in a laser printer.

The statement in the question states that bringing alternating voltage to a switchgear power supply that is not loaded can cause permanent damage. This suggests that applying alternating voltage to an unloaded switchgear power supply can have negative consequences, which supports the answer "True".

The role of the second grid (G2) in a cathode ray tube is to accelerate electrons towards the anode. This is achieved by applying a positive voltage of 500-600 volts to G2. This acceleration of electrons is necessary for the proper functioning of the cathode ray tube, as it helps to create a focused electron beam that can then be used for various purposes such as displaying images on a screen or measuring electrical signals.

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The correct answer is "halogeni grejač". This means that the fixing toner heater works in the preparatory state when it is designed as a halogen heater.

The correct answer is "četiri toner kasete." This means that the color laser printer contains four toner cartridges.

When the computer is turned off, the signal PS_ON transitions from logic 1 to logic 0.

The correct answer is "broj ekrana koji se 'iscrtaju' u 1 sekundi" which translates to "the number of screens that are 'drawn' in 1 second". This answer refers to the frequency of vertical scanning, indicating how many complete screens can be displayed in one second. It is a measure of the refresh rate or the speed at which the screen updates its content.

Modern graphic cards are connected to the motherboard via a PICe connector. This connector has 16 connection lines, allowing for a high-speed data transfer between the graphics card and the motherboard. These connection lines are essential for ensuring a stable and efficient communication between the two components, enabling the graphics card to deliver optimal performance.

If the screen is illuminated but there is no image, the most likely explanation is a faulty video amplifier (pre-amplifier with integrated LM1203H chip).

The correct answer is "Vertikalnom stepenu" (Vertical stage). This is because the question is asking about a horizontal white line appearing on a CRT monitor, and the issue is likely related to the vertical stage of the monitor. The vertical stage is responsible for controlling the vertical movement of the electron beam that creates the display on the screen. If there is a problem with this stage, it can result in various display issues, including horizontal lines. Therefore, the fault should be sought in the vertical stage.

The correct answer explains that the ucesnost horizontalnog skeniranja refers to the number of horizontal lines that are "cut" in one second. This means that it is the frequency at which the scanning process moves horizontally across the screen, capturing each line.

In SAN systems, the device that initiates communication is called the Initiator. This device takes the initiative to start the communication process with other devices in the SAN network. It sends requests and commands to other devices, such as targets, to perform specific tasks or retrieve data. The Initiator is responsible for initiating and managing the communication flow within the SAN system.

In SAN systems, the device that responds to the requests is called the target. However, it is important to note that the roles of initiator and target can be exchanged or changed as needed.

The frequency of power interruptions in the primary side of an inverter transformer is typically in the range of kilohertz (kHz). This is because inverters operate at high frequencies to convert DC power to AC power, and any interruptions in the primary side would affect the output AC power. Therefore, a frequency of 50 kHz is a reasonable estimate for the frequency of power interruptions in the primary side of an inverter transformer.

The correct answer is "impulsnog tipa". The explanation for this is that an impulsnog tipa signal refers to a pulse signal, which is a type of signal that consists of a series of pulses or brief bursts of energy. In the context of a power supply circuit, using a pulse signal to control the base voltage of a transistor helps to stabilize the voltage by providing precise and controlled bursts of energy. This allows for more efficient regulation of the voltage and helps to prevent fluctuations or variations in the output.

The correct answer is "n redova i 3m kolona." This is because the TFT panel has m rows and n columns, and each column consists of 3 subpixels (red, green, and blue). Therefore, there are n rows and 3m columns in total.

The correct answer is 0.3 V because the question is asking for the voltage value of the LVDS video signal for a TFT monitor. LVDS stands for Low Voltage Differential Signaling, which is a type of signaling used for high-speed data transmission. The voltage level for LVDS signaling is typically around 0.3 V, making it suitable for noise-immune and high-speed data transmission in devices like TFT monitors.

The correct answer is "negativno naelektrisana" which means "negatively charged" in English. This means that the surface of the photosensitive drum of the toner cartridge is negatively charged after the primary charging phase.

The correct answer is "digitalni signali." This means that the vertical and horizontal sync channels for a CRT monitor, which are sent by the video card, are digital signals. Digital signals are composed of discrete values (usually 0s and 1s) and are used to transmit information in a binary format. In the context of a CRT monitor, these digital signals are responsible for synchronizing the display's scanning and refreshing process, ensuring that the image appears correctly on the screen.

The correct answer is "podaci za 2 piksela I kontrolni signali". This means that the output of a scaler TFT monitor consists of data for 2 pixels and control signals. This suggests that the monitor is capable of processing and displaying information for multiple pixels simultaneously, and it requires control signals to coordinate and regulate the display.

The correct answer is PS202 because it is the sensor for presence/absence of paper at the input of the laser printer.

The correct answer is USB. The explanation is that USB is one of the three groups of standardized connectors used for powering peripheral devices. The other two groups mentioned in the question are Molex and SATA.

The correct answer is "je priključen na pozitivni napon" because during the toner transfer phase, the transfer roller needs to be connected to a positive voltage in order to attract the toner particles from the drum onto the paper. This positive charge helps in the efficient transfer of toner and ensures that the excess toner is removed from the roller, resulting in a clean and accurate printing process.

The correct answer is "mora da postoji za CRT monitore". This is because CRT monitors require an analog signal to display images, and the RAMDAC component of a video card is responsible for converting the digital signals from the computer into analog signals that can be understood by the CRT monitor. Therefore, the presence of a RAMDAC is necessary for CRT monitors to function properly.

During the developing phase, toner particles pass over the developing roller and become negatively charged.

The correct answer is "komponentu svetlosti sa ulaza čiji je ugao polarizacije pod pravim uglom u odnosu na orijentaciju molekula filtra". This means that the polarizing filter only allows the component of light from the input whose polarization angle is perpendicular to the orientation of the filter's molecules.

The correct answer is "velikih dimenzija." This means that the reason why a network transformer is not used in PC computers is because of their large size.

The correct answer is "vertikalne crne linije na odštampanoj stranici." This is because the question mentions that "ogrebotine na površini fotoosetljivog valjka u toner kaseti crno-belog laserskog štampača izazivaju" which translates to "scratches on the surface of the photosensitive roller in the toner cassette of a black and white laser printer cause." Therefore, it can be inferred that these scratches would result in vertical black lines on the printed page.

The correct answer is +5V because PWR_OK is a signal that indicates whether the power supply is providing a stable and acceptable voltage level. In this case, it is set to a value of +5V, which is a common voltage level for many electronic devices. This indicates that the power supply is functioning properly and providing the necessary power for the device to operate.

The correct answer is "usmeravanje elektronskog mlaza na željenu tačku ekrana". The role of deflection coils (kalems, HSK, VSK) in a CRT monitor is to control the movement of the electron beam and direct it to the desired point on the screen. The deflection coils generate a magnetic field that interacts with the electron beam, causing it to move horizontally and vertically across the screen, thus creating the images we see. Therefore, the deflection coils play a crucial role in ensuring that the electron beam is properly directed to the desired location on the screen.

The correct answer is "najveći iznos izlazne snage koji može da se dobije, ali u veoma kratkom vremenu." This means that the peak power output of the power supply is the maximum amount of power that can be obtained, but only for a very short period of time. It suggests that the power supply is capable of delivering a high amount of power in short bursts, but may not be able to sustain that level of power output continuously.

The correct answer is "Kod matričnih štampača, celo slovo se štampa odjednom." This statement is incorrect because in dot matrix printers, each character is formed by a matrix of dots and is printed one dot at a time.

To form one pixel in a TFT monitor, it requires 3 transistors. Transistors are essential components in TFT (Thin Film Transistor) technology, which is commonly used in flat-panel displays like LCD monitors. These transistors control the flow of electrical current to each pixel, allowing for precise control of brightness and color. Therefore, to create a single pixel, three transistors are needed to control the red, green, and blue subpixels, enabling the display of a full range of colors.

The correct answer is "fokusiranje elektronskog mlaza". The third grid (G3) in a cathode ray tube is responsible for focusing the electron beam. It helps to ensure that the beam is directed accurately and precisely onto the screen, resulting in a clear and sharp image.

The correct answer is SAN (Storage Area Network). A SAN is a network architecture where a remote storage device is connected via a network, and the storage disks and devices are presented as a local operating system. This allows for centralized storage management and easy access to data across multiple servers.

The correct answer is "Jeftino rešenje" (Cheap solution). This means that a cheap solution is not included in the advantages of the DAS system. The other options listed - acceptable availability, data security and error resistance, and low complexity of driver configuration - are all advantages of the DAS system.

The given correct answer states that the capacity of storage space is practically unlimited is NOT a main advantage of a DAS system. This means that DAS systems do not have the advantage of practically unlimited storage capacity.

LCD monitori rade u jednoj, svojoj prirodnoj rezoluciji određenoj brojem piksela. This statement is correct because LCD monitors have a fixed number of pixels and can only display images at their native resolution. When the resolution is set to anything other than the native resolution, the image may appear stretched or blurry.

When the output DC voltages stabilize

The given answer states that "Kapacitet skladišnog prostora je praktično neograničen" (The capacity of the storage space is practically unlimited) is not a main advantage of a DAS system. This means that the DAS system does not have the advantage of having practically unlimited storage capacity.

The correct answer is "the maximum amount of power that can be obtained from the power stage but in a short period of time." This means that the power stage is capable of delivering a high amount of power, but only for a short duration. This could be due to limitations such as heat dissipation or the capacity of the power source.

The RAMDAC component of a video card determines the maximum resolution and color depth. It is responsible for converting analog signals to digital, generating horizontal sync pulses, and processing 3D signals.

The correct answer is PTC otpornika. PTC otpornik je pozitivni temperaturni koeficijent otpornosti, što znači da se njegova otpornost povećava sa porastom temperature. Kada se koristi u namotaju za razmagnetisanje ekrana, PTC otpornik će ograničiti protok struje kroz namotaj i sprečiti preopterećenje i oštećenje ekrana.

The correct answer is "Katoda I anoda." The explanation for this answer is that inside the cathode ray tube (CRT) monitor, there are two important components: the cathode and the anode. The cathode emits electrons, while the anode attracts and accelerates these electrons towards the screen, creating the images we see on the monitor. Both the cathode and the anode play crucial roles in the functioning of the CRT monitor.

This suggests that the correct answer is "pozitivan napon reda 500 - 600V" because it states that a positive voltage of the order of 500-600V is applied to the second grid (G2).

The correct answer is "uključenje jedne linije panela." This means that the output of the DC/DC converter of the TFT panel is used to power one line of the panel.

The correct answer is "Učestanost horizontalnog skeniranja se meri u Hz." This statement is incorrect because the frequency of horizontal scanning is measured in kHz (kilohertz) and not in Hz (hertz). Hz is the unit of measurement for frequency, but in this context, it is not the correct unit to measure the frequency of horizontal scanning.

The correct answer is "kontrola intezita boja na ekranu" which means "control of color intensity on the screen". This suggests that the role of the first grid (G1) of a cathode ray tube is to regulate the intensity of colors displayed on the screen.

The given answer states that the solution is relatively expensive. This suggests that implementing the solution mentioned in the question may require a significant financial investment. It implies that there are cheaper alternatives available, but this particular solution may offer additional benefits or features that justify its higher cost.

The correct answer is "negativan" because the question is asking about the potential difference between the G1 grid and the cathodes. In a vacuum tube, the G1 grid is typically negatively charged relative to the cathodes.

The given statement states that the transfer roller is NOT a part of the toner cartridge. The transfer roller is responsible for transferring the toner from the photosensitive drum onto the paper during the printing process. Since it is not a part of the toner cartridge, it must be a separate component that is involved in the printing process but not directly related to the toner cartridge.

The correct answer is "Losim kontaktima skretnih kalemova i stampane ploce" which translates to "Poor contacts of deflection coils and printed circuit board." This suggests that if a vertical white line appears on a CRT monitor, the problem may be due to poor contacts between the deflection coils and the printed circuit board.

The statement suggests that when the power supply is not operating at full load, its power decreases and its lifespan is reduced. However, this is not true. In fact, power supplies are designed to operate efficiently at different load levels, including partial loads. Operating at lower loads does not necessarily decrease the power supply's lifespan.

The statement is false because modern computers have power supplies ranging from 63.5 W to 1000 W.

The correct answer is "podaci su dostupni svim računarima u mreži" (data is accessible to all computers on the network). This is because NAS (Network Attached Storage) systems are designed to provide centralized storage that can be accessed by multiple users or computers on a network. Unlike DAS (Direct Attached Storage) systems, which are directly connected to a single computer, NAS allows for simultaneous access to data by multiple users, making it more efficient and convenient for sharing and collaboration within a network environment.

The correct answer is "sa horizontalnog izlaznog stepena". This means that the high voltage for powering the Anode is obtained from the horizontal output stage.

The correct answer is "Povezan na radnu stanicu bez računarske mreže". This is because DAS (Direct Attached Storage) refers to a storage device that is directly connected to a workstation without the need for a computer network. It is typically connected without a keyboard and display, meaning it is directly attached to the workstation for local storage purposes.

The output of the DC/DC converter of the TFT panel is used for operating the driver circuits. This means that it is responsible for providing power to the driver circuits, which are essential for driving and controlling the display of the TFT panel.

The correct answer is 15 pinova. Uređaji koji podržavaju ATA(SATA) standard se napajaju preko SATA power konektora koji ima 15 pinova. This answer states that devices that support the ATA(SATA) standard are powered through a SATA power connector that has 15 pins.

The correct answer is PS_ON & 5V_SB. The ATX standard introduced two new signals called "soft power" which include PS_ON and 5V_SB.

Standard graphics cards that consume more than 75W cannot be powered by the motherboard alone. They require additional power connectors, such as PCIe power connectors, to provide the necessary power for their operation. This is because the power drawn by these high-performance graphics cards exceeds the power that the motherboard can supply on its own. Therefore, the correct answer is False.

Personalni računari ne koriste linearni tip stepena za napajanje, već prekidački tip. Prekidački tipovi stepena za napajanje su efikasniji, manjih dimenzija, manje se greju i jeftiniji su od linearnih tipova.

When using an external adapter of another device, three pieces of information should be checked: output DC voltage, polarity, and maximum peak load. The maximum peak load refers to the maximum amount of current that the adapter can supply at any given time. The other options, output DC voltage, polarity, and maximum output current, are all correct and should be checked when using an external adapter. Therefore, the correct answer is to eliminate the option of maximum peak load.

The main advantage of a SAN system is the ability to achieve extremely high data throughput. This means that the system is capable of transferring large amounts of data at a very fast rate. This is beneficial for applications that require high-performance and real-time data access, such as database management systems or video editing. The independent nature of SAN system characteristics from the type of computer network and the relatively low cost and high reliability due to limited user access are not relevant to the ability to achieve extremely high data throughput.

The given statement is false. The motherboard and expansion cards typically support voltage ranges from +3.3V to +5V, but they do not commonly use a voltage of -5V.

The statement is false because a 6-pin connector can only provide 75W of power, not 150W. Therefore, the total power that can be supplied to the graphics card through the connector is 75W, not 225W.

The characteristics of a SAN system directly depend on the type of computer network. This means that the features and capabilities of a SAN system will vary depending on the specific type of computer network it is being implemented in.

The given correct answer states that one of the main advantages of a SAN system is the ability to achieve extremely high data throughputs. This means that SAN systems have the capability to handle large amounts of data at high speeds, making them suitable for applications that require fast and efficient data transfer. This advantage is independent of the type of computer network and is not affected by the characteristics of the SAN system or its cost-effectiveness and reliability.

The given answer states that the main drawback of a SAN system is its relatively high cost. This means that implementing a SAN system can be expensive, which may be a significant disadvantage for organizations with limited budgets. It implies that the cost factor outweighs other potential drawbacks mentioned in the question, such as the limited storage capacity and the inability to achieve high data throughput.

When a photoconductive material is exposed to light, it becomes electrically conductive, causing the areas on the photosensitive drum hit by the laser beam to become discharged.

The correct answer is "Vreme pristupa je znatno brže nego kod DAS sistema." This means that the access time is significantly faster compared to the Direct Attached Storage (DAS) system. This suggests that the NAS system allows for quicker retrieval and transfer of data, making it more efficient and convenient for users.

The correct answer is "koja se odnosi na neprekidno napajanje komponenata računara." This means that the maximum continuous power refers to the uninterrupted power supply for computer components. It indicates the maximum amount of power that can be obtained from the power supply without any interruptions or fluctuations.

The correct answer is "odgovoran je za transport papira." This statement suggests that the "Kontroler laserskog stampaca" is responsible for the paper handling in the printer. It implies that the controller is in charge of feeding the paper into the printer and managing its movement throughout the printing process.

The given statement suggests that it is recommended to use a power supply with the same power as required, as maximum energy efficiency is achieved by operating at maximum loads. However, this statement is false. While it is important to match the power supply to the requirements of the device being powered, operating at maximum loads does not necessarily result in maximum energy efficiency. In fact, power supplies are typically most efficient when operated at around 50-70% of their maximum load capacity. Operating at lower loads can result in lower efficiency and operating at maximum loads can lead to increased heat generation and potential reliability issues.

The correct answer is "Nije neophodna primena dodatnih mehanizama poverljivosti" because it states that the implementation of additional confidentiality mechanisms is not necessary. This means that the NAS system does not require additional measures to ensure the confidentiality of stored data.

The statement suggests that higher quality power sources do not introduce any additional delay and simply short the output voltage of +5V to PWR_OK without checking the state of the output signals. However, this is not true. Higher quality power sources typically have built-in protection mechanisms and advanced circuitry that ensure proper voltage regulation, signal monitoring, and safety features. They do not simply short the output voltage without any checks. Therefore, the given statement is false.

The given statement is false. On a molex connector, the grounding is usually done through the black wires, while the red wires carry +5V and the yellow wires carry +12V. Therefore, the correct answer is false.

The given correct answer is "Niska pouzdanost" which translates to "Low reliability" in English. This suggests that the NAS system is not reliable or dependable. The other options mention possible congestion due to limited bandwidth and processing power, the need for additional mechanisms to ensure data confidentiality, and slower access time compared to DAS systems. However, the correct answer focuses on the low reliability of the NAS system, indicating that it may not be trustworthy or stable in its operations.

The given statement is false. A polarizing filter does not have any effect on the wavelengths of electromagnetic waves. Instead, it selectively filters out light waves that are vibrating in a specific direction, allowing only light waves with a certain polarization to pass through. This filter is commonly used in photography to reduce glare and reflections, improve color saturation, and enhance contrast.

The given statement is false. Personal computers use direct current (DC) rather than alternating current (AC) for powering the HDD motors and optical devices. The +12V, +5V, and +3.3V voltages are all DC voltages used to power the various components of a computer, including the logic circuits.